Abstract
Three categories of stainless steel P/M samples were prepared using the microwave hybrid heating method at super-solidus state temperature (1300 °C). The effect of sintering parameters on pore morphologies and electrochemical behavior of the samples were analysed with different holding time. The electrochemical/electrical characteristics were derived from the PDP/EIS measurements and it has shown an increase in passive film capability with the holding time. The 316L, 430L and 410 have exhibited 37%, 23% and 53% decrement respectively in corrosion rate upon increasing holding time from 30 to 60 min. A parameter active area factor deduces from EIS measurements is decreased by 6–18 times. The variation in corrosion morphologies for three grades of stainless steel is characterized through E-MAP analysis.
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